Implementing Parallel Language Constructs Using a Re Blockinective Object-oriented Language

To provide various parallel language constructs, extensible languages based on re ection are attractive for both implementors and users. This paper describes our proposed meta-level architecture of a concurrent object-oriented language ABCL/R3, which has the following characteristics: (1) language customization through meta-interpreters and meta-objects, (2) delegation and inheritance mechanisms facilitating modular and re-usable metalevel programming, and (3) the re ective annotations and meta-level arguments realizing separation of baseand meta-level programs. We also show that several meta-level programs that provide common parallel programming strategies, such as object replication and latency hiding, are easily implemented. 1 Parallel Languages and Re ec-